diff --git a/library/ecjpake.c b/library/ecjpake.c
index 3381c7c..cee56b4 100644
--- a/library/ecjpake.c
+++ b/library/ecjpake.c
@@ -1104,7 +1104,7 @@
     TEST_ASSERT( len == sizeof( ecjpake_test_pms ) );
     TEST_ASSERT( memcmp( buf, ecjpake_test_pms, len ) == 0 );
 
-    memset( buf, 0, len ); /* Avoid interferences with next step */
+    mbedtls_platform_memset( buf, 0, len ); /* Avoid interferences with next step */
 
     /* Client derives PMS */
     TEST_ASSERT( mbedtls_ecjpake_derive_secret( &cli,